The only thing that exists in creation is the upper force, called “One, Unique, Eternal.” It created something that would be able to feel it.
This “something” is called a vessel, Kli, a soul, or a creation; it senses only what surrounds and fills it, namely, the very upper force that created it.
This sensation begins to appear in the Kli as the most simple, very faint feeling, the slightest impression of the upper force. It is a natural reaction inherent to the nature of the Kli and requires no effort on the part of the Kli to arise. This faint natural impression is termed this world.
The upper force has a specific program regarding the Kli it created; the Kli is destined to perceive the upper force up to a certain degree called infinity. The Kli was created with an inherent readiness for precisely this measure of perception, and the upper one guides its development it so that it may ultimately perceive Him in His full, infinite measure.
The Kli gradually develops an increasing degree of sensitivity to the upper force. Its development takes place in stages; these stages are called worlds. In total, there are five stages of development.
Initially, the Kli is in a completely unconscious state relative to the upper force, much like an embryo in its mother’s womb. We designate this specific sensation as this world, which in the broader scheme is the lowest degree of the world of Assiya.
Subsequently, the Kli can develop heightened sensitivity and thereby perceive the upper force as the worlds of Assiya, Yetzira, Beria, Atzilut, the world of Adam Kadmon, and finally, as Infinity. We refer to the impressions experienced by the Kli by the names of the lights NRNHY (Nefesh, Ruach, Neshama, Haya, and Yechida). The Kli can feel only its own properties and how, through those properties, it attains the upper force. This is all that it is capable of feeling.
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From the Daily Kabbalah Lesson 4/27/26, Rabash, “Peace After a Dispute Is More Important than Having No Disputes At All”
Related Material:
The Beginning of the Development of Creation
The Reason for the Creation of the Worlds
The Purpose Of Creation And The Development Of Desire



